SpongeBob SquarePants: Underpants Slam is an action puzzle game that features licensed characters from the SpongeBob SquarePants animated series. The game was released on Xbox Live Arcade on December 26, 2007. The game is THQ's first game designed for download, alongside Screwjumper!, another action game for the Xbox Live Arcade service. This is technically not the first SpongeBob game to be released on Xbox 360 since it was made for the Xbox Live Arcade. Since January 7, 2013 this game has been delisted from the Xbox Live Marketplace and is unable to be bought anymore.
A storm current has disrupted a shipment of the undergarments of King Neptune's underwear, spreading them across the ocean floor. Neptune has called upon his subjects to collect the lost undergarments, with a reward offered to the one who collects the most underwear.
Players progress through 10 levels of play by collecting 99 pairs of underwear in each level. Playable characters include SpongeBob, Patrick, Mr. Krabs, Plankton, and Sandy. Levels are populated by jellyfish, who can swim away with pairs of underpants. These stolen underpants can only be retrieved by attacking the jellyfish, failure to attack at the right moment results in an electrical shock. Most pairs of underpants are scattered around levels, though several are hidden in objects such as pipes and boxes which must be destroyed. Power-ups such as a magnet to draw in nearby bloomers can be collected throughout the levels; though, some can have negative effects such as reversing the controls.
The game received mixed to negative reviews from critics due to the confusing level design. Metacritic gave the game 3/5, IGN ranked it 4.7/10, and GamesRadar gave it a 3.5/5.